Mount system-probe.yaml in the process-agent container when enabled (#23035)

* Mount system-probe.yaml in the process-agent container when enabled

https://github.com/helm/charts/pull/22686/files changed the location of
the system-probe socket away from the default.

Since the process-agent was relying on the socket being at the default
location by dint of not having the system-probe.yaml file, this commit
broke the process-agent -> system-probe communication.

Signed-off-by: Lee Avital <lee.avital@datadoghq.com>

* rev version

Signed-off-by: Lee Avital <lee.avital@datadoghq.com>

stable/datadog/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: datadog
-version: 2.3.19
+version: 2.3.20
 appVersion: "7"
 description: Datadog Agent
 keywords:

stable/datadog/templates/container-process-agent.yaml

@@ -56,6 +56,9 @@
     - name: sysprobe-socket-dir
       mountPath: /var/run/sysprobe
       readOnly: true
+    - name: sysprobe-config
+      mountPath: /etc/datadog-agent/system-probe.yaml
+      subPath: system-probe.yaml
     {{- end }}
     {{- end }}
 {{- end -}}